My recipe remains pretty faithful to Craddock's classic 1930s proportions, but in line with modern bartending conventions, I now disregard Craddock's instructions...
Sorry, I think you misunderstand me. The typo is not here in your guide, but in Craddock's 1930 Savoy Cocktail Book. Ensslin's Recipes for Mixed Drinks has the Crème de Violette in the Aviation, and the Savoy plagiarizes heavily from Ensslin's book.